Our service

Cryptocurrency Options

Investors in virtual assets such as cryptocurrencies often face large price movements with limited capabilities to hedge against them.

As part of the movement towards a healthier, deeper and more stable market, we aim to provide products like financial options which will help to mitigate these risks.




About us

Protoption was founded by investment and technology professionals from global financial institutions where they managed a hedge fund and its associated risk management systems.

With this knowledge and experience, we aim to establish a cryptocurrency option market and help our clients to manage their risks, and to contribute to the overall stability of this new asset class.

Protoption Overview

Name Protoption Ltd
Location Ito Building 5F
1-2 Yotsuya, Shinjuku City, Tokyo, Japan
Established .... March 2019
Protoption is fully owned by Cryptact Ltd.

What is Cryptact?

Cryptact is a FinTech startup company aiming to provide services centering on cryptocurrencies.
Our first service was an online web-based service called tax@cryptact aiming to help investors in cryptocurrencies manage their comprehensive ledger of transactions for reporting and tax purposes. It has grown to Japan's largest in this kind with over 30,000 users.

Who we are


Gaku Saito


'Feb. 19 - Joined Cryptact as Co-CEO
'May. 10 - Jan. 19 *_Goldman Sachs Investment Partners_* Worked as a portfolio manager in GSIP, a multi asset hedge fund, and managed USD800M portfolio. The main investment strategy was equity long/short in listed companies based on a fundamental approach building financial models. Also, invested in equity derivatives, bond/CDS, FX and mezzanine loan products.
'Apr. 07 - Apr. 10 *_Goldman Sachs - Asia Special Situations Group_* Executed over US$500M investment in non/sub-performing loan portfolios, private equities, real estate portfolio and vessels portfolio. Participated in a number of sponsorship auctions on bankrupt real estate developers.
'05 Bachelor of System Innovation Engineering, The University of Tokyo
'07 Master of Environmental & Ocean Engineering, The University of Tokyo

Amin Azmoudeh

Managing Director

After graduating with a BS in Computer Science and a BA in Japanese from the University of Maryland in 2003, Amin joined Goldman Sachs Tokyo as the sole technologist of Tokyo’s GSPS team, a principal strategies unit managing the firm’s capital. In 2005 he changed careers to become a financial analyst with GSPS and in 2007 transferred to GSIP (Goldman Sachs Investment Partners) as part of the spin-out of the team into GSAM. As a financial/analyst and portfolio manager, Amin managed listed/unlisted equities, bonds, swaps, interest rate products, foreign exchange, derivatives as well as overall risk management. He was promoted to Managing Director in 2013 and retired from Goldman Sachs on December 31st, 2017 to found Cryptact.

Shunsuke Masuda

Managing Director

Shunsuke has spent his nearly 20 year career as a technologist/developer in several of Japan’s largest securities companies. In 2006 he joined Morgan Stanley Tokyo developing systems for mutual funds, investment advice and asset management. In 2010 he joined Goldman Sachs to develop overall trading, investment and risk systems for GSIP (Goldman Sachs Investment Partners). Shunsuke graduated from Shinshu University with a Master’s Degree in Information Technology. He also attended the Faculty of Science program at Kyoto University and holds an MBA from Waseda University’s finance program.

Contact us

For inquiries, please send us an email with your name and contact address.